Drying-cylinder.



'No. 693,233. 3 Patehted Feb. 1902.

I n; u; CHADWICK'.

DRYING IEYLINDER. (Applicbtion filed June a. 1901.

(No Ilndal.)

THE ucnms PETERS 00.. PHOTCLITITNOV. WASHINGTON, 04 c,

NITED STATES P TENT OFFICE.

RICHARD U. OI-IADWIOK, OF PHILADELPHIA, PENNSYLVANIA.

DRYING-CYLINDER.

bPECIFlGATION forming part of Letters Patent No. 693,233, dated February 11, 1902 Application filed June 5,19o1. Serial No. 63,250. (its model.)

ments in cylinders or cans heated by steam for drying any materialsuch as warps, cloth, paper, &c.passed over theiroutside surface,

-and more particularly to improved means for removing condensed water from the inside of said cylinders.

The object of my invention is the provision of devices which will rapidly and certainly remove water from the interior of a dryingcylinder as rapidly as it is formed, irrespective of the speed of rotation of the cylinder. This object I attain as hereinafter set forth, reference being had to the accompanying drawings, in which Figure 1 is a sectional elevation of my improved form of drying-cylinder. Fig. 2 is a side View of one end of the cylinder. Fig. 3 is a sectional view of the head of the old form of cylinder, showing my invention applied thereto. Fig. 4 is a side view ofa cylinderhead provided with scoop-tubes for removing for rotation of the cylinder in eitherdirection.

Fig. 7 is a plan view, partlyin section, showing the form and construction of the double scoop-tubes shown in Fig. 4; and Fig. 8 is an enlarged detail view of a portion of one of the scoop-tubes.

In the drawings, A is a cylinder which in connection with a number of others is designed to be used for drying lengths or pieces of cloth, warp, paper, &c., passed over its outside surface. This cylinder has heads B B, each providedwith a hollow trunnion b I), made to turn in suitable bearings in a machine of any well-known form. Through one of these trunnions, as .b, steam is made to enter the interior of the cylinder, and the other, I), is connected to a suitable drain-pipe (not shown) for carrying off the water discharged. v

The head B has cast integral with it a tube 12 of the form best shown in Fig. 2, which communicates with the hollowtrunnion b. As seen in this figure, the said tube or'condnit starts tangent to the curve of the periphery of the cylinder-head and for the first part of its length departs from this curve very slightly. If, however, gradually changes its direction morerapidly until it has reached the center of the cylinder,where it com municates with the hollow trunnion through a curved section, as shown in Fig. 1 of the drawings. By this construction I avoid the angular form of conduits hitherto found in devices of this class, providing fora free and unobstructed flow of water and compelling the same to make no sharp changes of direction. It will be seen from Fig. 1 that at its beginning'or intake end this tube b is comparatively long and narrow in cross-section,

while as it extends toward the outlet it be- When it is desired to run the cylinder alternately in opposite directions, a form of tube construction is employed similar to that illustrated in Figs. 4 and 7. These tubes b have the same shape of curve as the conduit shown in Fig. 2, but form channels entirely independent of each other all the way to their outlet at the other end of the trunnion, this construction beingemployed to prevent water collected by one tube from flowing into the other instead of being discharged through the saidtrunnion. It will be seen that where the two pipes enter the trunnion they merge or empty into a single pipe b but the two passages are still maintained independent by a partition if. r v

In order to properly drain the tubes when the cylinder is out of operation, small triangular openings 1) are formed in the convex side or bottom thereof, these being made as clearly illustrated in Fig. 8. The Water normally flowing through the tube in the direction indicated by the arrow is made to pass over these openings by means of the upwardlyprojecting tongues bflwhile as soon as the cylinder ceases to move any water atthat time in the curved part of the tube freely passes under said tongues and out of the openings, thus draining the tube in any position of the cylinder.

In drying-cylinders of any length it is necessary to provide interior ring stays or braces, ordinarily known as blocks, there being two of these, 0 G, in the cylinder shown in Fig. 1, and in order that the water of condensation may flow freely from one end of the cylinder to the other openings 0 c are made in these rings. Ordinarily when the cylinder is rotated rapidly the said stays or rings would cut through the water, not allowing sufficient time for it to pass through these openings, and in view of this I provide vanes or guides c c to assist the flow of said water. These vanes are inclined at an angle both to the axis of the cylinder and to the plane of the stay 0, a vane being placed at one edge of each hole or opening 0, thereby collecting a quantity of water and forcing it toward and through the hole. 1 preferably attach one edge of each vane to the inside surface of the drying-cylinder, thereby making them act as lateral stays to the stiffening-ring and causing them to assist in supporting said cylinder againsta possible pressure either from the inside or outside thereof. These vanes preferably extend on both sides of the plane of the the ring-stays C, and, in addition to their action by which water is directed toward and through the openings 0, also act to throw the water away from the ring 0 after it has passed through the said openings. It will, however, be understood that I may, if desired, use the vanes or guides c c on one side only of the ring C without departing from the main idea of my invention. By this means a clear space is made for the water delivered through one of the openings 0 by the next following vane, this fresh volume freely passing through the said opening without interference or choking from the water previously discharged, thus materiallyincreasing the rapidity of the flow of the water toward the end of the cylinder, the ring-stay O, with its vanes, assisting the flow rather than retarding it.

In order to run the cylinder in both directions and discharge the water toward the outlet end, as before, I preferably use a construction similar to that shown in Fig. 6 and at O in Fig. 1, where one-half of the collectingvanes c are inclined in one direction and the above and shown in the figures a result is obtained not possible with other forms of apparatus in use. The high speed at which modern drying machinery is operated requires some device which shall collect and expel the water of condensation in spite of the increased centrifugal force. The gradual curve of' the first part of my improved couduit makes it possible to collect and to start toward the center the water at the lowest part or bottom of the cylinder, and as the rotation of said cylinder continues and the curve of the tube becomes more pronounced the said water flows toward the center with an increased velocity and out through the trunnion irrespective of the speed of the cylinder.

It is to be noted that by the use of a closed. collecting tube or conduit at the end of my drying-cylinder the flow of water through the same is materially aided by the steam-pressure within the cylinder, this acting to force the water through said collecting-conduit with a greater or less degree of intensity, depending upon the pressure of said steam. In addition to this advantage noted the closed form of conduit makes it impossible for the water once collected to return to the cylinder while the same is in motion, preventing splashing or throwing around of said water, with the consequent danger of sudden condensation of steam and possible collapse of the cylinder.

I claim as my invention-- 1. A drying-cylinder in combination with a curved conduit for removing water from the interior of the cylinder, the said conduit having in it drainage-openings provided with deflectors whereby. water is prevented from passing through said openings when the cylinder is rotated, substantially as described.

2. A drying-cylinder revolubly supported on tubular trunnions, closed curved conduits connected to one of the trunnions and constructed to collect and remove water from the cylinder, said trunnion being provided with means to prevent communication between the conduits, said means extending to the outer or discharge end of the trunnion, substantially as described.

3. A drying-cylinder revolubly supported on tubular trunnions, closed conduits curved in opposite directions connected to one of the trunnions and constructed to collect and remove water irrespective of the directions of rotation of: the cylinder, said trunnion being constructed to prevent communication between the conduits to the outer or discharge end of said trunnion, substantially as described.

4.. A drying-cylinder having tubular trunnions, curved conduits within the cylinder communicating with one of said trunnions, said conduits being joined, a section common to both being provided with a partition extending through the trunnion to the outer or discharge end of the same,- whereby water is prevented from flowing from one conduit to the other as the cylinder is revolved, substantially as described.

5. A drying-cylinder supported on tubular trunnions, one of said trunnions being divided to form two channels, a closed curved conduit connected to each of said channels, said conduits curving in opposite directions and being constructed to collect and remove Water from the cylinder irrespective of the direction of rotation of said cylinder, snb'- stantially as described.

6. Adrying-cylinder having within itastifiening-ring provided with openings for the passage of water, relatively short inclined.

and through the same, a number of said vanes being inclined oppositely to the others whereby Water is delivered through the openings in the ring irrespective of the direction of rotation of the cylinder, substantially as described.

8. A drying-cylinder having within it astiff ening-ring provided with openings for the passage of water, inclined vanes extending on both sides of the stifitening-ring, constructed to guide water toward and through said openings; said vanes being secured to the inside surface'of the cylinder as well as to said stifiening-rings, and being placed at relatively frequent intervals along the entire circumference of the ring, thereby acting as lateral stays to said ring, substantially as described. In testimony whereof I have signed my name to this specification in the presence'ot' two subscribing Witnesses.

RICHARD U. CI-IADWIOK. Witnesses: I

WILLIAM E. BRADLEY, J os. H. KLEIN 

